// https://www.luogu.com.cn/problem/B2014

#include <stdio.h>

int main() {
    double v;
    double pi = 3.14159;
    scanf("%lf", &v);

    printf("%.4lf %.4lf %.4lf\n", v*2.0, v*2.0*pi, pi*v*v);
    return 0;
}